Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)
A black body is at a temperature of 2880 K. The energy of radiation emitted by this object with wavelength between 499 nm and 500 nm is U1, between 999 nm and 1000 nm is U2 and between
25
Oct
A black body is at a temperature of 2880 K. The energy of radiation emitted by this object with wavelength between 499 nm and 500 nm is U1, between 999 nm and 1000 nm is U2 and between A black body is at a temperature of 2880 K. The energy of radiation emitted by this [...]
A planet radiates heat at a rate proportional to the fourth power of its surface temperature T. If such a steady temperature of the planet is due to an exactly equal amount of heat
25
Oct
A planet radiates heat at a rate proportional to the fourth power of its surface temperature T. If such a steady temperature of the planet is due to an exactly equal amount of heat A planet radiates heat at a rate proportional to the fourth power of its surface temperature T. If such a steady [...]
The radiation emitted by a star A is 10000 times that of the sun. If the surface temperatures of the sun and star A are 60000 K and 2000 K, respectively, the ratio of the radii of the
25
Oct
The radiation emitted by a star A is 10000 times that of the sun. If the surface temperatures of the sun and star A are 60000 K and 2000 K, respectively, the ratio of the radii of the respectively The radiation emitted by a star A is 10000 times that of the sun. If the [...]
When the temperature of a black body increases, it is observed that the wavelength corresponding to maximum energy changes from 0.26 mu m to 0.13 mu m. The ratio of the
25
Oct
When the temperature of a black body increases, it is observed that the wavelength corresponding to maximum energy changes from 0.26 mu m to 0.13 mu m. The ratio of the it is observed that the wavelength corresponding to maximum energy changes from 0.26 mu m to 0.13 mu m. The ratio of the When [...]
A room at 20 C is heated by a heater of resistance 20 ohm connected to 200 V mains. The temperature is uniform throughout the room and the heat is transmitted through a glass
25
Oct
A room at 20 C is heated by a heater of resistance 20 ohm connected to 200 V mains. The temperature is uniform throughout the room and the heat is transmitted through a glass A room at 20 C is heated by a heater of resistance 20 ohm connected to 200 V mains. The temperature [...]
Two hollow spheres of different materials, one with double the radius and one-fourth wall thickness of the other, are filled with ice. If the times taken for complete melting of ice
25
Oct
Two hollow spheres of different materials, one with double the radius and one-fourth wall thickness of the other, are filled with ice. If the times taken for complete melting of ice are filled with ice. If the times taken for complete melting of ice one with double the radius and one-fourth wall thickness of the [...]
Three rods of identical cross-sectional area and made from the same metal form the sides of an isosceles triangle ABC right angled at B. The points A and B are maintained at temperatures
25
Oct
Three rods of identical cross-sectional area and made from the same metal form the sides of an isosceles triangle ABC right angled at B. The points A and B are maintained at temperatures Three rods of identical cross-sectional area and made from the same metal form the sides of an isosceles triangle ABC right angled [...]
The earth receives on its surface radiation from the sun at the rate of 1400 W/m^2. The distance of the centre of the sun from the surface of the earth is 1.5 * 10^11 m and the radius
25
Oct
The earth receives on its surface radiation from the sun at the rate of 1400 W/m^2. The distance of the centre of the sun from the surface of the earth is 1.5 * 10^11 m and the radius The earth receives on its surface radiation from the sun at the rate of 1400 W/m^2. The [...]
A system receives heat continuously at the rate of 10 W per sq. unit area. The temperature of the system becomes constant at 70 C when the temperature of the surroundings is 30
25
Oct
A system receives heat continuously at the rate of 10 W per sq. unit area. The temperature of the system becomes constant at 70 C when the temperature of the surroundings is 30 A system receives heat continuously at the rate of 10 W per sq. unit area. The temperature of the system becomes constant [...]
Three rods AB, BC and BD of same length l and cross-sectional area A are arranged as shown. The end D is immersed in ice whose mass is 440 g and is at 0 C. The end C is maintained
25
Oct
Three rods AB, BC and BD of same length l and cross-sectional area A are arranged as shown. The end D is immersed in ice whose mass is 440 g and is at 0 C. The end C is maintained BC and BD of same length l and cross-sectional area A are arranged as shown. [...]